{"cve":"CVE-2008-5557","nvd":{"published":"2008-12-23T18:30:03.313","modified":"2026-06-16T23:00:33.027","status":"Modified","description":"Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows context-dependent attackers to execute arbitrary code via a crafted string containing an HTML entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://archives.neohapsis.com/archives/fulldisclosure/2008-12/0477.html","http://bugs.php.net/bug.php?id=45722","http://cvs.php.net/viewvc.cgi/php-src/ext/mbstring/libmbfl/filters/mbfilter_htmlent.c?r1=1.7&r2=1.8","http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02029444","http://lists.apple.com/archives/security-announce/2009/May/msg00002.html"],"products":["php:php"],"source":"nvd","synced_at":"2026-10-19T19:53:23.791937413+00:00"},"epss":{"cve":"CVE-2008-5557","score":0.07371,"percentile":0.94416,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}